Eyebrows typically take about 2 to 4 months to grow back fully, but this can vary depending on individual factors such as the extent of damage, age, genetics, and overall health.

Eyebrow Hair Growth Cycle

Eyebrow hair growth occurs in three phases:

• Anagen (growth phase): Lasts about 30 to 45 days for eyebrows. This is when the hair follicle actively produces hair.
• Catagen (transition phase): Lasts 2 to 3 weeks, during which hair growth stops and the follicle shrinks.
• Telogen (resting phase): Lasts 2 to 4 months, where hair rests before shedding and new growth begins

Because eyebrows have a much shorter anagen phase than scalp hair, their growth is slower and more limited in length.

Typical Regrowth Timelines

• For minor damage like slight over-plucking or threading, eyebrows can start to visibly regrow within 4 to 6 weeks.
• For normal healthy follicles , new hairs typically begin to appear in 2 to 3 weeks, with full regrowth taking around 2 to 3 months.
• In cases of severe damage or follicle injury, regrowth can take several months or longer, and may require treatments to stimulate growth.
• Eyebrow hair grows approximately 0.14 to 0.16 mm per day, contributing to the overall timeline

Additional Factors

• Age and genetics influence growth speed; younger people and those with thicker hair tend to regrow faster.
• If follicles are damaged, treatments like minoxidil may help stimulate regrowth.
• Eyebrow transplants have a different timeline: initial shedding occurs in 2 to 4 weeks, new growth starts around 3 to 4 months, and full results appear by about 12 months

In summary, while visible eyebrow hair can start growing back within a few weeks, full regrowth usually takes around 2 to 4 months depending on individual circumstances